Summary

In this chapter, we covered the topic of stateful applications and how to integrate them with Kubernetes. We discovered that stateful applications are complicated and considered several mechanisms for discovery, such as DNS and environment variables. We also discussed several state management solutions, such as in-memory redundant storage, local storage, and persistent storage. The bulk of the chapter revolved around deploying a Cassandra cluster inside a Kubernetes cluster using a StatefulSet. We drilled down into the low-level details in order to appreciate what it really takes to integrate a third-party complex distributed system like Cassandra into Kubernetes. At this point, you should have a thorough understanding of stateful applications and how to apply them within your Kubernetes-based system. You are armed with multiple methods for various use cases, and maybe you’ve even learned a little bit about Cassandra.

In the next chapter, we will continue our journey...